Scanner drive system having minimum rotational error carriage suspension
US5589972A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1996 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Feb 12, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04734
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanning apparatus providing separate fixed object focal planes for transmissive and reflective original documents to be scanned, wherein a scan carriage containing illumination, sensor, and optical elements is moved together to scan an original document and to obtain a digitized representation thereof. The movable scan carriage has an illumination source disposed between the reflective and transmissive object focal planes, with the object focal plane to be used selected by changing the position of one or more optical elements within the scan carriage. The scan carriage is suspended along an axis substantially parallel to a scan line of a scanned original document and passing through a point substantially coincident with the scan line, thereby minimizing variations in lighting conditions due to vibration of the scan carriage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.